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<div class="moz-cite-prefix">12.07.2012 14:36, Paul Meems (Top-X)
пишет:<br>
</div>
<blockquote
cite="mid:CAHNf2YTTzpAEri+2BoADe1Suo4jmvoWpGvcFUcx3rH+_R7Rjpg@mail.gmail.com"
type="cite">Thanks Even,<br>
<br>
<a moz-do-not-send="true"
href="http://www.gdal.org/gdalbuildvrt.html">http://www.gdal.org/gdalbuildvrt.html</a>
does seems very interesting.<br>
As I understand it, it will do the merging part (without actually
merging).<br>
<br>
But it doesn't do the tiling part, right? Or is the vrt so
optimized tiling is no longer necessary?<br>
<br>
Thanks,<br>
<br>
Paul
<br>
<br>
<br>
<div class="gmail_quote">2012/7/12 Even Rouault <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:even.rouault@mines-paris.org" target="_blank">even.rouault@mines-paris.org</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Selon "Paul Meems (Top-X)" <<a moz-do-not-send="true"
href="mailto:p.meems@topx-group.nl">p.meems@topx-group.nl</a>>:<br>
<div>
<div class="h5"><br>
> Hi list,<br>
><br>
> I have several aerial photos and I use MapWindow GIS
to view them.<br>
> MapWindow is already using GDAL v1.8<br>
><br>
> Instead of loading each aerial photo as an individual
layer I want to<br>
> create a local tiles store of the photos.<br>
> I can then just load the tiles I need based on the
scale and view. This<br>
> will most likely improve the performance.<br>
><br>
> The process will be something like this:<br>
> 1. Get the filenames of the photos<br>
> 2. Merge them into one<br>
> 3. Create tiles<br>
> 4. Put the tiles in a SQLite database<br>
><br>
> My first question: Is the above suggested process
correct or should I do it<br>
> differently?<br>
> My second question: What GDAL functions should I look
into to accomplish my<br>
> process?<br>
<br>
</div>
</div>
You could try to make a VRT from all your photos. It will be
seen as a single<br>
GDAL dataset, and will take care of the burden of opening the
underlying photos<br>
when needed. You can use the gdalbuildvrt utility to create
the VRT from the<br>
photos.<br>
<div class="im"><br>
><br>
> Thanks,<br>
><br>
> Paul Meems<br>
> The Netherlands<br>
><br>
<br>
<br>
</div>
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</blockquote>
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<br>
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</blockquote>
There is an interesting work connected aerial imagery: <a
href="http://trac.osgeo.org/gdal/wiki/Correlator">http://trac.osgeo.org/gdal/wiki/Correlator</a><br>
<a href="http://correlatorgsoc2012.blogspot.com/">http://correlatorgsoc2012.blogspot.com/</a><br>
<br>
Best regards,<br>
Dmitry<br>
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